If I were you, I'd call up the show "Cheaters" and set up a sting. Although, you want to make sure you look like a giant redneck when you confront him on camera.
You gotta do what you gotta do for ratings.
I was thinking the OP could just have somebody stake out the room, and watch the person when he leaves. A cell phone camera can catch him in the act if he is cheating.
Of course if they were to do this, it would exalt them both to kings of Douchebaggery, especially if the guy has an innocent reason for leaving.
BTW, people with non-insulent dependent diabetes when their blood sugar goes high can pee as much as every hour like clockwork.